Here is the log of my code(3 times ran):

Time: 3540ms Passed: 132 Failed: 0
Test Results:
 Basic Tests
 It should works for basic tests. (32 of 32 Assertions)
Completed in 70ms
 100 Random Tests --- Testing for correctness of solution
 It should works for random tests. (100 of 100 Assertions)
Completed in 2881ms
 Happy Coding ^_^
 Log
I'm waiting for your feedback, rank and vote.many thanks! ;-) 
You have passed all of the tests! :)



Time: 3430ms Passed: 132 Failed: 0
Test Results:
 Basic Tests
 It should works for basic tests. (32 of 32 Assertions)
Completed in 85ms
 100 Random Tests --- Testing for correctness of solution
 It should works for random tests. (100 of 100 Assertions)
Completed in 2692ms
 Happy Coding ^_^
 Log
I'm waiting for your feedback, rank and vote.many thanks! ;-) 
You have passed all of the tests! :)


Time: 5066ms Passed: 132 Failed: 0
Test Results:
 Basic Tests
 It should works for basic tests. (32 of 32 Assertions)
Completed in 70ms
 100 Random Tests --- Testing for correctness of solution
 It should works for random tests. (100 of 100 Assertions)
Completed in 4389ms
 Happy Coding ^_^
 Log
I'm waiting for your feedback, rank and vote.many thanks! ;-) 
You have passed all of the tests! :)

So, if your code got timeout, please check it about performance ;-)